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-rw-r--r--src/vnet/ipsec/ipsec_spd_fp_lookup.h324
1 files changed, 324 insertions, 0 deletions
diff --git a/src/vnet/ipsec/ipsec_spd_fp_lookup.h b/src/vnet/ipsec/ipsec_spd_fp_lookup.h
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+++ b/src/vnet/ipsec/ipsec_spd_fp_lookup.h
@@ -0,0 +1,324 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#ifndef IPSEC_SPD_FP_LOOKUP_H
+#define IPSEC_SPD_FP_LOOKUP_H
+
+#include <vnet/ipsec/ipsec.h>
+
+/**
+ * @brief function handler to perform lookup in fastpath SPD
+ * for inbound traffic burst of n packets
+ **/
+
+inline u32
+ipsec_fp_in_policy_match_n (void *spd_fp, u8 is_ipv6,
+ ipsec_fp_5tuple_t *tuples,
+ ipsec_policy_t **policies, u32 *policy_ids, u32 n)
+{
+ return 0;
+}
+
+static_always_inline int
+single_rule_match_5tuple (ipsec_policy_t *policy, ipsec_fp_5tuple_t *match)
+{
+ if (PREDICT_FALSE (policy->is_ipv6 != match->is_ipv6))
+ return (0);
+
+ if (PREDICT_FALSE (policy->protocol != IPSEC_POLICY_PROTOCOL_ANY &&
+ (policy->protocol != match->protocol)))
+ return (0);
+
+ if (!policy->is_ipv6)
+ {
+ if (PREDICT_FALSE (
+ clib_net_to_host_u32 (match->laddr.as_u32) <
+ clib_net_to_host_u32 (policy->laddr.start.ip4.as_u32)))
+ return (0);
+
+ if (PREDICT_FALSE (clib_net_to_host_u32 (match->laddr.as_u32) >
+ clib_net_to_host_u32 (policy->laddr.stop.ip4.as_u32)))
+ return (0);
+
+ if (PREDICT_FALSE (
+ clib_net_to_host_u32 (match->raddr.as_u32) <
+ clib_net_to_host_u32 (policy->raddr.start.ip4.as_u32)))
+ return (0);
+
+ if (PREDICT_FALSE (clib_net_to_host_u32 (match->raddr.as_u32) >
+ clib_net_to_host_u32 (policy->raddr.stop.ip4.as_u32)))
+ return (0);
+ }
+ else
+ {
+
+ if (ip6_address_compare (&match->ip6_laddr, &policy->laddr.start.ip6) <
+ 0)
+ return (0);
+
+ if (ip6_address_compare (&policy->laddr.stop.ip6, &match->ip6_laddr) < 0)
+
+ return (0);
+
+ if (ip6_address_compare (&match->ip6_raddr, &policy->raddr.start.ip6) <
+ 0)
+
+ return (0);
+
+ if (ip6_address_compare (&policy->raddr.stop.ip6, &match->ip6_raddr) < 0)
+
+ return (0);
+ }
+
+ if (PREDICT_FALSE ((match->protocol != IP_PROTOCOL_TCP) &&
+ (match->protocol != IP_PROTOCOL_UDP) &&
+ (match->protocol != IP_PROTOCOL_SCTP)))
+ {
+ return (1);
+ }
+
+ if (match->lport < policy->lport.start)
+ return (0);
+
+ if (match->lport > policy->lport.stop)
+ return (0);
+
+ if (match->rport < policy->rport.start)
+ return (0);
+
+ if (match->rport > policy->rport.stop)
+ return (0);
+
+ return (1);
+}
+
+static_always_inline u32
+ipsec_fp_ip6_out_policy_match_n (void *spd_fp, ipsec_fp_5tuple_t *tuples,
+ ipsec_policy_t **policies, u32 *ids, u32 n)
+
+{
+ u32 last_priority[n];
+ u32 i = 0;
+ u32 counter = 0;
+ ipsec_fp_mask_type_entry_t *mte;
+ u32 *mti;
+ ipsec_fp_5tuple_t *match = tuples;
+ ipsec_policy_t *policy;
+
+ u32 n_left = n;
+ clib_bihash_kv_40_8_t kv;
+ /* result of the lookup */
+ clib_bihash_kv_40_8_t result;
+ ipsec_fp_lookup_value_t *result_val =
+ (ipsec_fp_lookup_value_t *) &result.value;
+ u64 *pkey, *pmatch, *pmask;
+ ipsec_main_t *im = &ipsec_main;
+ ipsec_spd_fp_t *pspd_fp = (ipsec_spd_fp_t *) spd_fp;
+ u32 *mask_type_ids = pspd_fp->fp_mask_types[IPSEC_SPD_POLICY_IP4_OUTBOUND];
+
+ /*clear the list of matched policies pointers */
+ clib_memset (policies, 0, n * sizeof (*policies));
+ clib_memset (last_priority, 0, n * sizeof (u32));
+ n_left = n;
+ while (n_left)
+ {
+ vec_foreach (mti, mask_type_ids)
+ {
+ mte = im->fp_mask_types + *mti;
+
+ pmatch = (u64 *) match;
+ pmask = (u64 *) &mte->mask;
+ pkey = (u64 *) kv.key;
+
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+
+ int res = clib_bihash_search_inline_2_40_8 (
+ &pspd_fp->fp_ip6_lookup_hash, &kv, &result);
+ /* lookup the hash by each packet in the burst for this mask. */
+
+ if (res == 0)
+ {
+ /* There is a hit in the hash table. */
+ /* Find the policy with highest priority. */
+ /* Store the lookup results in a dedicated array. */
+
+ if (vec_len (result_val->fp_policies_ids) > 1)
+ {
+ u32 *policy_id;
+ vec_foreach (policy_id, result_val->fp_policies_ids)
+ {
+ policy = im->policies + *policy_id;
+
+ if (single_rule_match_5tuple (policy, match))
+ {
+ if (last_priority[i] < policy->priority)
+ {
+ last_priority[i] = policy->priority;
+ if (policies[i] == 0)
+ counter++;
+ policies[i] = policy;
+ ids[i] = *policy_id;
+ }
+ }
+ }
+ }
+ else
+ {
+ u32 *policy_id;
+ ASSERT (vec_len (result_val->fp_policies_ids) == 1);
+ policy_id = result_val->fp_policies_ids;
+ policy = im->policies + *policy_id;
+ if (single_rule_match_5tuple (policy, match))
+ {
+ if (last_priority[i] < policy->priority)
+ {
+ last_priority[i] = policy->priority;
+ if (policies[i] == 0)
+ counter++;
+ policies[i] = policy;
+ ids[i] = *policy_id;
+ }
+ }
+ }
+ }
+ }
+ n_left--;
+ match++;
+ i++;
+ }
+ return counter;
+}
+
+static_always_inline u32
+ipsec_fp_ip4_out_policy_match_n (void *spd_fp, ipsec_fp_5tuple_t *tuples,
+ ipsec_policy_t **policies, u32 *ids, u32 n)
+
+{
+ u32 last_priority[n];
+ u32 i = 0;
+ u32 counter = 0;
+ ipsec_fp_mask_type_entry_t *mte;
+ u32 *mti;
+ ipsec_fp_5tuple_t *match = tuples;
+ ipsec_policy_t *policy;
+
+ u32 n_left = n;
+ clib_bihash_kv_16_8_t kv;
+ /* result of the lookup */
+ clib_bihash_kv_16_8_t result;
+ ipsec_fp_lookup_value_t *result_val =
+ (ipsec_fp_lookup_value_t *) &result.value;
+ u64 *pkey, *pmatch, *pmask;
+ ipsec_main_t *im = &ipsec_main;
+ ipsec_spd_fp_t *pspd_fp = (ipsec_spd_fp_t *) spd_fp;
+ u32 *mask_type_ids = pspd_fp->fp_mask_types[IPSEC_SPD_POLICY_IP4_OUTBOUND];
+
+ /* clear the list of matched policies pointers */
+ clib_memset (policies, 0, n * sizeof (*policies));
+ clib_memset (last_priority, 0, n * sizeof (u32));
+ n_left = n;
+ while (n_left)
+ {
+ vec_foreach (mti, mask_type_ids)
+ {
+ mte = im->fp_mask_types + *mti;
+
+ pmatch = (u64 *) &match->laddr;
+ pmask = (u64 *) &mte->mask.laddr;
+ pkey = (u64 *) kv.key;
+
+ *pkey++ = *pmatch++ & *pmask++;
+ *pkey++ = *pmatch++ & *pmask++;
+
+ int res = clib_bihash_search_inline_2_16_8 (
+ &pspd_fp->fp_ip4_lookup_hash, &kv, &result);
+ /* lookup the hash by each packet in the burst for this mask. */
+
+ if (res == 0)
+ {
+ /* There is a hit in the hash table. */
+ /* Find the policy with highest priority. */
+ /* Store the lookup results in a dedicated array. */
+
+ if (vec_len (result_val->fp_policies_ids) > 1)
+ {
+ u32 *policy_id;
+ vec_foreach (policy_id, result_val->fp_policies_ids)
+ {
+ policy = im->policies + *policy_id;
+
+ if ((last_priority[i] < policy->priority) &&
+ (single_rule_match_5tuple (policy, match)))
+ {
+ last_priority[i] = policy->priority;
+ if (policies[i] == 0)
+ counter++;
+ policies[i] = policy;
+ ids[i] = *policy_id;
+ }
+ }
+ }
+ else
+ {
+ u32 *policy_id;
+ ASSERT (vec_len (result_val->fp_policies_ids) == 1);
+ policy_id = result_val->fp_policies_ids;
+ policy = im->policies + *policy_id;
+ if ((last_priority[i] < policy->priority) &&
+ (single_rule_match_5tuple (policy, match)))
+ {
+ last_priority[i] = policy->priority;
+ if (policies[i] == 0)
+ counter++;
+ policies[i] = policy;
+ ids[i] = *policy_id;
+ }
+ }
+ }
+ }
+
+ i++;
+ n_left--;
+ match++;
+ }
+ return counter;
+}
+
+/**
+ * @brief function handler to perform lookup in fastpath SPD
+ * for outbound traffic burst of n packets
+ * returns number of successfully matched policies
+ **/
+
+static_always_inline u32
+ipsec_fp_out_policy_match_n (void *spd_fp, u8 is_ipv6,
+ ipsec_fp_5tuple_t *tuples,
+ ipsec_policy_t **policies, u32 *ids, u32 n)
+
+{
+ if (is_ipv6)
+ return ipsec_fp_ip6_out_policy_match_n (spd_fp, tuples, policies, ids, n);
+ else
+ return ipsec_fp_ip4_out_policy_match_n (spd_fp, tuples, policies, ids, n);
+}
+
+#endif /* !IPSEC_SPD_FP_LOOKUP_H */